The U.S. Army Corps of Engineers, St. Paul District, is closing four of its locks and dams in early December for maintenance. The closures will officially end the 2023 navigation season on the Mississippi River between Minneapolis and Guttenberg, Iowa. They will also enable inspection, maintenance and upgrade work at some of the facilities
Locks and dams 2 and 4 will close to all river traffic Dec. 4 – March 5, 2024, and locks and dams 3 and 7 will be closed Dec. 4 – March 15, 2024.
Lock and Dam...
https://www.marinelog.com/news/st-paul-engineer-district-to-close-four-locks-and-dams/